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Interactions médicamenteuses

Disopyramide + Maprotiline

Gravité: Contre-indiquée

Disopyramide and Maprotiline: contraindicated interaction.

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Résumé

Both drugs can prolong the QT interval, and combining them raises the risk of torsades de pointes and other serious ventricular arrhythmias. Maprotiline also has quinidine-like conduction effects, and disopyramide is itself strongly proarrhythmic.

Ce que signifie cette interaction, en termes simples

Disopyramide and Maprotiline are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.

Disopyramide belongs to Cardiovascular; Maprotiline belongs to Central Nervous System.

Niveau de preuve: Moderate

Pourquoi elle survient

Additive pharmacodynamic QT prolongation and slowed cardiac conduction.

Conduite à tenir

Avoid the combination and choose an antidepressant with lower QT liability if an antiarrhythmic is required. If it cannot be avoided, obtain a baseline ECG, correct potassium and magnesium, and monitor QTc continuously.

Questions à poser à votre pharmacien

  • Is there an alternative to one of these two medicines for me?
  • If both are essential, who is monitoring me and how often?
  • Which symptoms mean I should stop and seek help straight away?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Questions fréquentes

Can I take Disopyramide with Maprotiline?

MediHelp rates the interaction as contraindicated. Disopyramide and Maprotiline are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Both drugs can prolong the QT interval, and combining them raises the risk of torsades de pointes and other serious ventricular arrhythmias. Maprotiline also has quinidine-like conduction effects, and disopyramide is itself strongly proarrhythmic.

How serious is the interaction between Disopyramide and Maprotiline?

MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination and choose an antidepressant with lower QT liability if an antiarrhythmic is required. If it cannot be avoided, obtain a baseline ECG, correct potassium and magnesium, and monitor QTc continuously.

What other medicines interact with Maprotiline?

MediHelp also lists interactions of Maprotiline with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Maprotiline page.

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